Rapid detection of melamine in whole milk mediated by unmodified gold nanoparticles

Fang Wei, Robert Lam, Stacy Cheng, Steven Lu, Dean Ho, Na Li

Research output: Contribution to journalArticle

105 Scopus citations


A strategy for rapid and facile detection of melamine in food and other substances is described. Unmodified gold nanoparticles enable a colorimetric signal output that is amplified through integration by precipitation formation via a chemical component specific to melamine. The sensitivity was determined to be ∼40 ppb with a two standard deviation cutoff.

Original languageEnglish (US)
Article number133702
JournalApplied Physics Letters
Issue number13
StatePublished - Apr 12 2010


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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